Achievement

The Pikachu plushie is obtainable as a gift after spending a
specific amount of Dream Points.
First Pikachu can be obtained after spending 1000 DP
Second Pikachu can be obtained after spending 2500 DP
Third Pikachu can be obtained after spending 5000 DP
Fourth Pikachu can be obtained after spending 10,000 DP
Fifth Pikachu can be obtained after spending 25,000 DP
Sixth Pikachu can be obtained after spending 50,000 DP

Shiny Ditto is found in Professor Rowan's Lab.
On occasion, the Ditto image in the top corner will change into a
shiny Ditto.
Clicking on it will provide a random chance to obtain the Shiny
Ditto plushie.

The Pokémon Minior (Meteor) is now available as a special Plushie
at the Dream World Shop!
Every time you buy a Minior Plushie for a friend, you automatically
receive a colored Minior (Core) for your own collection! There are
seven different colors available - the one you receive is chosen
randomly. This is not a time-limited event.

Events

Shaymin

Obtainable as one of the three gifts Shaymin can give you during
the Summer time Shaymin event. Shiny Shaymin plushies were
obtainable for every 5 Shaymin plushies collected.
01/Aug/2017 to 31/Aug/2017
28/Jul/2016 to 04/Sep/2016
30/July/2015 to 10/Sep/2015 (Normal Shaymin only)
23/July/2014 to 25/Aug/2014 (Normal Shaymin only)

Mew Event

A normal Mew plushie required 500 Dream Points to be spent. After
obtaining a Mew Plushie, users were able to obtain a Mew egg when
visiting the Ancient Cave after July 17th, 2017. Shiny Mew plushies
were also obtainable every 5 Mew plushies.
01/July/2018 to 16/July/2018
01/July/2017 to 16/July/2017
01/Jul/2016 to 15/Jul/2016
17/July/2015 to 05/Aug/2015
01/July/2014 to 14/July/2014 (Normal Mew Only)